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    Mesh Topology

                     In this topology, every single node in a network is connected
                     to all the other nodes or computers in the network. There
                     are minimal chances of breakdown in this topology. This
                     topology is mostly used in LANs.

                           NETWORK ARCHITECTURE                                                   Mesh Topology

                     The network architecture defines the overall design of the computer network. There are two
                     types of network architectures.

                     Peer-to-Peer Network

                     It is a network of two or more computers that uses the same
                     type of program to share the data.  Each computer is considered
                     to have equal responsibilities and acts like a server to the other
                     computers in the network. It works well in small environment.
                     There is no central server in a peer-to-peer network.
                     Client-Server Network                                                     Peer-to-Peer Network

                     It is a network in which one computer is designated as the server and all the other computers

                     connected on the network are called the clients. The clients can request for the services from the
                     server. This is called the client-server network.

                                                               Internet
                                             Clients

                                                                                                Server

                                                             Client-Server Network

                           COMPUTER NETWORK SECURITY

                     Computer network security refers to the practice of protecting a computer network and its data
                     from various security threats such as cyberattacks, unauthorised access, data breaches, malware
                     and other malicious activities.
                     Here are key components of computer network security:

                        Firewalls: Firewalls act as a barrier between a trusted internal network and untrusted external
                       networks (e.g., the internet). They monitor and control incoming and outgoing traffic based
                       on predefined security rules.

                                                                                Introduction to Computer Network         13

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